Improved fastening structure for classifier impeller

Abstract

This application discloses an improved fastening structure for a classifier impeller, comprising: a main shaft; a classifier impeller with a mounting through hole, the main shaft being connected to the mounting through hole via a key; the main shaft extending below the classifier impeller, and the portion of the main shaft extending below the classifier impeller having an external thread structure; a fixing nut threadedly connected to the external thread structure and abutting against the lower end of the classifier impeller to fix the classifier impeller to the main shaft; and a locking nut threadedly connected to the external thread structure, with a first stop washer provided between the fixing nut and the locking nut. This utility model patent solves the problems in the prior art where the main shaft cover is easily deformed, leading to damage to the threaded hole on the main shaft connected to the tension bolt; and the problem that fixing the main shaft cover to the main shaft requires opening a threaded hole on the main shaft, thus affecting the strength of the main shaft.

Description

Technical Field

[0001] This application relates to an improved classifier impeller optimization fastening structure, belonging to the field of air classifier technology. Background Technology

[0002] During the operation of the air classifier, power is transmitted via a key. Simultaneously, under the influence of gravity and the dynamic balancing force generated during the rotation of the classifier impeller, a significant downward force is generated. At this point, a main shaft cover is used to secure the classifier impeller to the end face of the main shaft using tension bolts, thus preventing the impeller from falling off. However, under conditions of significant impeller weight and prolonged use, the following risks may arise: 1) The main shaft cover may deform. This deformation increases the distance between the classifier impeller and the main shaft shoulder, causing the impeller to move axially along the main shaft, resulting in damage to the threaded holes on the main shaft connected to the tension bolts; 2) Fixing the main shaft cover to the main shaft requires threaded holes on the main shaft, which may affect the strength of the main shaft.

[0003] Therefore, the inventors proposed an improved classifier impeller optimization fastening structure that can effectively solve the above problems. Summary of the Invention

[0004] The purpose of this application is to provide an improved classifier impeller optimization fastening structure to solve the problems in the prior art where the main shaft cover deforms, which in turn increases the distance between the classifier impeller and the main shaft shoulder, causing the classifier impeller to move axially along the main shaft and resulting in damage to the threaded holes on the main shaft that connect to the tension bolts; and the problem that fixing the main shaft cover to the main shaft requires opening threaded holes on the main shaft, which affects the strength of the main shaft.

[0005] The technical problem to be solved in this application is achieved by the following technical solution:

[0006] An improved classifier impeller optimized fastening structure includes:

[0007] A spindle, on which a first keyway is provided;

[0008] The classifier impeller is provided with a mounting through hole, and a second keyway is provided in the mounting through hole. The main shaft is connected to the mounting through hole by a key.

[0009] The main shaft extends below the classifier impeller, and the portion of the main shaft extending below the classifier impeller is provided with an external thread structure;

[0010] A fixing nut is threaded onto the external thread structure and abuts against the lower end of the classifier impeller to fix the classifier impeller to the main shaft;

[0011] A locking nut is threadedly connected to the external thread structure, and a first locking washer is provided between the fixing nut and the locking nut.

[0012] Preferably, the classifier impeller comprises:

[0013] A hub, wherein the hub is provided with a mounting through hole, and the main shaft is connected to the mounting through hole by a key;

[0014] The blades are fixedly connected to the hub, and multiple blades are evenly arrayed along the circumference of the hub to form an annular grading cavity, thereby optimizing the material dispersion and grading efficiency.

[0015] There are two support rings, which are spaced apart along the height direction of the blade.

[0016] Preferably, the classifier impeller further includes a support ring, which is fixedly connected to the blade.

[0017] Preferably, the blade has a stepped structure.

[0018] Preferably, the main shaft is provided with a fastening assembly, which is used to rotatably connect the main shaft to the classifier housing.

[0019] Preferably, the fastening assembly includes:

[0020] The bearing cover is fixedly connected to the air classifier housing, and the bearing cover abuts against the outer ring of the bearing. The bearing cover is used to press the outer ring of the bearing.

[0021] A positioning nut is screwed onto the main shaft and abuts against the inner ring of the bearing. The positioning nut is used to press the inner ring of the bearing.

[0022] Preferably, a round nut is also screwed onto the main shaft, and the round nut is used to lock the positioning nut.

[0023] Preferably, a second stop washer is provided between the round nut and the positioning nut, the second stop washer being used to prevent the round nut from loosening.

[0024] The beneficial effects of this application are:

[0025] 1. Compared with the prior art, this application provides an external thread structure at the portion of the main shaft extending below the classifier impeller; the fixing nut is threadedly connected to the external thread structure and abuts against the lower end of the classifier impeller to fix the classifier impeller to the main shaft; the locking nut is threadedly connected to the external thread structure, and a first stop washer is provided between the fixing nut and the locking nut. This solves the problems in the prior art where the main shaft cover deforms, which increases the distance between the classifier impeller and the main shaft shoulder, causing the classifier impeller to move axially along the main shaft, resulting in damage to the threaded hole on the main shaft connected to the tension bolt; and the problem that fixing the main shaft cover to the main shaft requires opening threaded holes on the main shaft, thus affecting the strength of the main shaft. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this application;

[0027] Figure 2 for Figure 1 A magnified structural diagram of A in the middle;

[0028] Figure 3 This is a schematic diagram of the impeller structure of a classifier;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the classifier impeller;

[0030] Figure 5 for Figure 1 A magnified structural diagram of B in the diagram.

[0031] In the diagram: 1. Main shaft; 2. Classifier impeller; 201. Hub; 202. Blade; 203. Support ring; 204. Support ring retaining ring; 205. Stepped structure; 3. Fixing nut; 4. Locking nut; 5. First stop washer; 6. Classifier housing; 601. Top rotating connection; 602. Bottom rotating connection; 7. Classifier cylinder; 8. Motor; 9. Grinded powder; 10. Bearing cover; 11. Bearing; 12. Positioning nut; 13. Round nut; 14. Second stop washer. Detailed Implementation

[0032] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this application, the following description, in conjunction with specific illustrations, further elaborates on this application.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides numerous different embodiments or examples for implementing various structures of the embodiments of this application. To simplify the disclosure of the embodiments of this application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this application; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in the embodiments of this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0037] like Figure 1-5 As shown, an improved classifier impeller 2 has an optimized fastening structure, including: a main shaft 1, a classifier impeller 2, a fixing nut 3, a locking nut 4, and a first stop washer 5.

[0038] Specifically, the main shaft 1 is provided with a first keyway; the classifier impeller 2 is provided with a mounting through hole, and a second keyway is provided in the mounting through hole. The main shaft 1 is connected to the classifier impeller through the first keyway, the key, and the second keyway; a portion of the main shaft 1 extends below the classifier impeller 2, and the portion of the main shaft 1 extending below the classifier impeller 2 is provided with an external thread structure; the fixing nut 3 is threadedly connected to the external thread structure and abuts against the lower end of the classifier impeller 2 to fix the classifier impeller 2 to the main shaft 1; the locking nut 4 is threadedly connected to the external thread structure, and a first stop washer 5 is provided between the fixing nut 3 and the locking nut 4.

[0039] Compared with the prior art, this application provides an external thread structure at the portion of the main shaft 1 extending below the classifier impeller 2; the fixing nut 3 is threaded to the external thread structure and abuts against the lower end of the classifier impeller 2 to fix the classifier impeller 2 to the main shaft 1; the locking nut 4 is threaded to the external thread structure, and a first stop washer 5 is provided between the fixing nut 3 and the locking nut 4. This solves the problems in the prior art where the main shaft 1 cover deforms, which increases the distance between the classifier impeller 2 and the main shaft 1 shoulder, causing the classifier impeller 2 to move axially along the main shaft 1 and damaging the threaded hole on the main shaft 1 connected to the tension bolt; and the problem that fixing the main shaft 1 cover plate to the main shaft 1 requires opening threaded holes on the main shaft 1, thus affecting the strength of the main shaft 1.

[0040] As a further preferred embodiment, the classifier impeller 2 includes: a hub 201, which has a mounting through hole and a second keyway; the main shaft 1 is connected to the hub 201 via a first keyway, a key, and a second keyway; blades 202, which are fixedly connected to the hub 201, and multiple blades 202 are evenly arrayed around the hub 201 to form an annular grading cavity, optimizing material dispersion and grading efficiency; and two support rings 203, which are spaced apart along the height direction of the blades 202, with each blade 202 fixedly connected to both support rings 203. To further enhance the strength of the upper part of the blades 202, the classifier impeller 2 also includes a support ring retainer 204, which is fixedly connected to the upper end of the blades 202 by welding. To reduce the amount of large particles entering the impeller 2 from the gap between the shell and the impeller 2, a stepped structure 205 is provided on the upper part of the blade 202. When the powder 9 approaches the impeller blade 202 from bottom to top after grinding, it is blocked by the stepped structure 205, which effectively prevents large particles from entering the impeller 2 and further improves the powder classification accuracy of the classifier.

[0041] The main shaft 1 is rotatably connected to the classifier housing 6 via bearing 11. The main shaft 1 and the classifier housing 6 have two rotatable connection parts, namely a bottom rotatable connection part 602 and a top rotatable connection part 601. The bottom rotatable connection part 602 is also provided with a sealing component, which is prior art. Please refer to the utility model patent application of this company with publication number CN218000401U. The top rotatable connection part 601 is provided with a fastening component, which is used to rotatably connect the main shaft 1 to the classifier housing 6 via the fastening component. The specific fastening components include: a bearing cap 10, which is fixedly connected to the classifier housing 6 by screws, and abuts against the outer ring of the bearing 11, the bearing cap 10 being used to press the outer ring of the bearing 11; and a positioning nut 12, which is screwed onto the main shaft 1 and abuts against the inner ring of the bearing 11. It should be noted that the upper end of the main shaft 1 is provided with an external thread structure, and the positioning nut 12 is used to press the inner ring of the bearing 11. There is a rotational clearance between the positioning nut 12 and the bearing cap 10. The positioning nut 12 presses the inner ring of the bearing onto the main shaft step. The bearing cap 10 mainly fixes the bearing axially to the main shaft, and the outer ring of the bearing and the classifier housing 6 are fitted together for assembly.

[0042] Furthermore, a round nut 13 is screwed onto the main shaft 1, which is used to lock the positioning nut 12. A second stop washer 14 is provided between the round nut 13 and the positioning nut 12 to prevent the round nut 13 from loosening. It should be noted that the upper end of the main shaft 1 is provided with an inner hole, and an inner groove is also provided on the inner hole. The output shaft of the motor 8 is connected to the main shaft 1 via a key.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this application; all such changes and modifications fall within the scope of the claims. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. An improved classifier impeller optimized fastening structure, characterized in that, include: spindle; The classifier impeller is provided with a mounting through hole, and the main shaft is connected to the mounting through hole by a key; The main shaft extends below the classifier impeller, and the portion of the main shaft extending below the classifier impeller is provided with an external thread structure; A fixing nut is threaded onto the external thread structure and abuts against the lower end of the classifier impeller to fix the classifier impeller to the main shaft; A locking nut is threadedly connected to the external thread structure, and a first locking washer is provided between the fixing nut and the locking nut.

2. The improved classifier impeller optimization fastening structure according to claim 1, characterized in that, The classifier impeller includes: A hub, wherein the hub is provided with a mounting through hole, and the main shaft is connected to the mounting through hole by a key; The blades are fixedly connected to the hub, and multiple blades are evenly arrayed along the circumference of the hub to form an annular grading cavity, thereby optimizing the material dispersion and grading efficiency. There are two support rings, which are spaced apart along the height direction of the blade.

3. The improved classifier impeller optimization fastening structure according to claim 2, characterized in that: The classifier impeller also includes a support ring, which is fixedly connected to the blade.

4. The improved classifier impeller optimization fastening structure according to claim 3, characterized in that: The blade has a stepped structure.

5. The improved classifier impeller optimization fastening structure according to claim 4, characterized in that: The main shaft is provided with a fastening assembly, which is used to rotatably connect the main shaft to the air classifier housing.

6. The improved classifier impeller optimization fastening structure according to claim 5, characterized in that, The fastening assembly includes: The bearing cover is fixedly connected to the air classifier housing, and the bearing cover abuts against the outer ring of the bearing. The bearing cover is used to press the outer ring of the bearing. A positioning nut is screwed onto the main shaft and abuts against the inner ring of the bearing. The positioning nut is used to press the inner ring of the bearing.

7. The improved classifier impeller optimization fastening structure according to claim 6, characterized in that: A round nut is also screwed onto the main shaft, and the round nut is used to lock the positioning nut.

8. The improved classifier impeller optimization fastening structure according to claim 7, characterized in that: A second stop washer is provided between the round nut and the positioning nut, and the second stop washer is used to prevent the round nut from loosening.

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